| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [been] written about [det] | 10 |
|
| 2 | have [been] written about [det] | 10 |
|
| 3 | has [been] written about [det] | 9 |
|
| 4 | [vb -s] [been] written about [det] | 9 |
|
| 5 | [been] written about [det] [noun sg] | 5 |
|
| 6 | [been] written about [det] [noun] | 5 |
|
